def test_insert(self):
seq1 = NoteSeq("Ab Bb Eb")
seq1.insert(2, Note("C#"))
seq2 = NoteSeq("Ab Bb C# Eb")
self.assertEqual(seq1, seq2)
def test_insert(self):
seq1 = NoteSeq("Ab Bb Eb")
seq1.insert(2, Note("C#"))
seq2 = NoteSeq("Ab Bb C# Eb")
self.assertEqual(seq1, seq2)
def create_music(self, lyrics, invention_method):
'''Generate music from text.
Music is generated by deriving notes from text, harmonizing those notes, and splitting them
into separate tracks, choosing a theme based on the text and then matching the tracks up.
:returns: word_theme=a string representing inspiration, music_theme=tempo and instrument list, track_list=list of tracks composed of notes
'''
#Read in characters in the lyrics, and convert to musical notes
derived_notes = self.music_helper.convert_phrase_to_notes(lyrics)
#Determine which musical key is dominant in the derived notes
music_key = self.music_helper.determine_dominant_key(derived_notes)
#Force all notes into the dominant key so we don't have dischord
notes = self.music_helper.conform_notes_to_key(derived_notes,
music_key)
#Tokenize the word list
lyric_words = nltk.word_tokenize(lyrics)
#Find a word that will provide a theme for the song
word_theme = random.choice(
[word for word in lyric_words if len(word) > 4])
if word_theme == None:
self.music_helper.determine_theme("random")
else:
tempo = max(
120, invention_method.method_list[0](word_theme) *
invention_method.method_list[4](word_theme) % 400)
instr1 = (invention_method.method_list[0](word_theme) *
invention_method.method_list[3](word_theme)) % 127
instr2 = (invention_method.method_list[1](word_theme) *
invention_method.method_list[2](word_theme)) % 127
instr3 = (invention_method.method_list[4](word_theme) *
invention_method.method_list[0](word_theme)) % 127
music_theme = (tempo, [instr1, instr2, instr3])
track_list = []
lead_track = NoteSeq()
other_notes = NoteSeq()
lead_note_duration = (invention_method.method_list[0](lyrics) %
6) * 0.05
lead_rest_duration = (invention_method.method_list[1](lyrics) %
8) * 0.25
#Separate notes into lead track/others, assign word-based duration
for i in range(0, len(notes)):
#Associate each note for the lead track with a word in the lyrics,
#until we're out of words, then put the rest in "other"
if i < len(lyric_words):
word_ptr = i
word_for_note = lyric_words[word_ptr]
#Exclude punctuation in lead track
if word_for_note not in (',', '.', ';', '!', '?', '"', ':',
'/', '\\'):
#Set notes duration based on word length
notes[i].dur = len(word_for_note) * lead_note_duration
lead_track.append(notes[i])
else:
other_notes.append(notes[i])
#Insert rests for lead track at punctuation marks
rest_count = 0
for i in range(0, len(lead_track)):
if lyric_words[i] in (',', '.', ';', '!', '?', '"', ':', '/',
'\\'):
lead_track.insert(i + rest_count, Rest(lead_rest_duration))
rest_count = rest_count + 1
#See how long the lead track is
lead_track_duration = sum(
[noteOrRest.dur for noteOrRest in lead_track])
#Then add it to our track list
track_list.append(lead_track)
#If there aren't enough notes, add some from the lead track
if len(other_notes) < 8:
lead_length = len(lead_track)
for i in range(lead_length - 1, max(0, lead_length - 8), -1):
if not isinstance(lead_track[i], Rest):
other_notes.append(lead_track[i])
#Attempt to detect patterns in the lyrics in combination with the
#other notes, for the purpose of creating more tracks using the agent's
#preferred invention method
if len(other_notes) > 0:
pattern_tracks = self.music_helper.derive_tracks_from_lyrics(
lyrics, other_notes, lead_track_duration,
invention_method.method_list)
for i in range(0, len(pattern_tracks)):
track_list.append(pattern_tracks[i])
#Find out which track came out the longest in duration
longest_duration = lead_track_duration
for i in range(1, len(track_list)):
this_track_duration = sum(
[noteOrRest.dur for noteOrRest in track_list[i]])
if this_track_duration > longest_duration:
longest_duration = this_track_duration
#Make the tracks equal in duration, so there isn't long silence
for i in range(0, len(track_list)):
#Calculate this track duration
this_track_duration = sum(
[noteOrRest.dur for noteOrRest in track_list[i]])
#Add some rests before/during to make it centered
if this_track_duration < longest_duration:
insert_rest = (longest_duration - this_track_duration) / 2
track_list[i].insert(0, Rest(insert_rest))
track_list[i].append(Rest(insert_rest))
#Add a 2 second pause to the end of the longest track so it ends gracefully
if this_track_duration == longest_duration:
track_list[i].insert(0, Rest(2))
return word_theme, music_theme, track_list
